Examples with PostInsertIdentityPersister org.hibernate.id.PostInsertIdentityPersister used on opensource projects

Example 1 with PostInsertIdentityPersister

use of org.hibernate.id.PostInsertIdentityPersister in project hibernate-orm by hibernate.

the class InsertExecutionDelegate method insertRootTable.

private void insertRootTable(String tableExpression, int rows, String[] keyColumns, ExecutionContext executionContext) {
    final TableReference updatingTableReference = updatingTableGroup.getTableReference(updatingTableGroup.getNavigablePath(), tableExpression, true, true);
    final IdentifierGenerator identifierGenerator = entityDescriptor.getEntityPersister().getIdentifierGenerator();
    final List<Assignment> assignments = assignmentsByTable.get(updatingTableReference);
    if ((assignments == null || assignments.isEmpty()) && !(identifierGenerator instanceof PostInsertIdentifierGenerator)) {
        throw new IllegalStateException("There must be at least a single root table assignment");
    }
    final NamedTableReference dmlTableReference = resolveUnionTableReference(updatingTableReference, tableExpression);
    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    // Create the SQL AST and convert it into a JdbcOperation
    final QuerySpec querySpec = new QuerySpec(true);
    final NamedTableReference temporaryTableReference = new NamedTableReference(insertStatement.getTargetTable().getTableExpression(), updatingTableReference.getIdentificationVariable(), false, sessionFactory);
    final TableGroupImpl temporaryTableGroup = new TableGroupImpl(updatingTableGroup.getNavigablePath(), null, temporaryTableReference, entityDescriptor);
    querySpec.getFromClause().addRoot(temporaryTableGroup);
    final InsertStatement insertStatement = new InsertStatement(dmlTableReference);
    insertStatement.setSourceSelectStatement(querySpec);
    for (Assignment assignment : assignments) {
        insertStatement.addTargetColumnReferences(assignment.getAssignable().getColumnReferences());
        for (ColumnReference columnReference : assignment.getAssignable().getColumnReferences()) {
            querySpec.getSelectClause().addSqlSelection(new SqlSelectionImpl(1, 0, new ColumnReference(updatingTableReference.getIdentificationVariable(), columnReference.getColumnExpression(), false, null, null, columnReference.getJdbcMapping(), sessionFactory)));
        }
    }
    final JdbcServices jdbcServices = sessionFactory.getJdbcServices();
    final Map<Object, Object> entityTableToRootIdentity;
    if (identifierGenerator instanceof PostInsertIdentifierGenerator) {
        final BasicEntityIdentifierMapping identifierMapping = (BasicEntityIdentifierMapping) entityDescriptor.getIdentifierMapping();
        final QuerySpec idSelectQuerySpec = new QuerySpec(true);
        idSelectQuerySpec.getFromClause().addRoot(temporaryTableGroup);
        final ColumnReference columnReference = new ColumnReference((String) null, TemporaryTable.ENTITY_TABLE_IDENTITY_COLUMN, false, null, null, identifierMapping.getJdbcMapping(), sessionFactory);
        idSelectQuerySpec.getSelectClause().addSqlSelection(new SqlSelectionImpl(1, 0, columnReference));
        idSelectQuerySpec.addSortSpecification(new SortSpecification(columnReference, SortOrder.ASCENDING));
        final SelectStatement selectStatement = new SelectStatement(idSelectQuerySpec, Collections.singletonList(new BasicFetch<>(0, null, null, identifierMapping, null, FetchTiming.IMMEDIATE, null)));
        final JdbcSelect jdbcSelect = jdbcServices.getJdbcEnvironment().getSqlAstTranslatorFactory().buildSelectTranslator(sessionFactory, selectStatement).translate(null, executionContext.getQueryOptions());
        final List<Object> list = jdbcServices.getJdbcSelectExecutor().list(jdbcSelect, JdbcParameterBindings.NO_BINDINGS, executionContext, null, ListResultsConsumer.UniqueSemantic.NONE);
        entityTableToRootIdentity = new LinkedHashMap<>(list.size());
        for (Object o : list) {
            entityTableToRootIdentity.put(o, null);
        }
        querySpec.applyPredicate(new ComparisonPredicate(columnReference, ComparisonOperator.EQUAL, new JdbcParameterImpl(identifierMapping.getJdbcMapping())));
    } else {
        entityTableToRootIdentity = null;
        if (identifierGenerator instanceof OptimizableGenerator) {
            final Optimizer optimizer = ((OptimizableGenerator) identifierGenerator).getOptimizer();
            // but only if the target paths don't already contain the id
            if (optimizer != null && optimizer.getIncrementSize() > 1 && insertStatement.getTargetColumnReferences().stream().noneMatch(c -> keyColumns[0].equals(c.getColumnExpression()))) {
                final BasicEntityIdentifierMapping identifierMapping = (BasicEntityIdentifierMapping) entityDescriptor.getIdentifierMapping();
                final JdbcParameter rowNumber = new JdbcParameterImpl(identifierMapping.getJdbcMapping());
                final JdbcParameter rootIdentity = new JdbcParameterImpl(identifierMapping.getJdbcMapping());
                final List<Assignment> temporaryTableAssignments = new ArrayList<>(1);
                final ColumnReference idColumnReference = new ColumnReference((String) null, identifierMapping, sessionFactory);
                temporaryTableAssignments.add(new Assignment(idColumnReference, rootIdentity));
                final TemporaryTableColumn rowNumberColumn = entityTable.getColumns().get(entityTable.getColumns().size() - 1);
                final UpdateStatement updateStatement = new UpdateStatement(temporaryTableReference, temporaryTableAssignments, new ComparisonPredicate(new ColumnReference((String) null, rowNumberColumn.getColumnName(), false, null, null, rowNumberColumn.getJdbcMapping(), sessionFactory), ComparisonOperator.EQUAL, rowNumber));
                final JdbcUpdate jdbcUpdate = jdbcServices.getJdbcEnvironment().getSqlAstTranslatorFactory().buildUpdateTranslator(sessionFactory, updateStatement).translate(null, executionContext.getQueryOptions());
                final JdbcParameterBindings updateBindings = new JdbcParameterBindingsImpl(2);
                for (int i = 0; i < rows; i++) {
                    updateBindings.addBinding(rowNumber, new JdbcParameterBindingImpl(rowNumberColumn.getJdbcMapping(), i + 1));
                    updateBindings.addBinding(rootIdentity, new JdbcParameterBindingImpl(identifierMapping.getJdbcMapping(), identifierGenerator.generate(executionContext.getSession(), null)));
                    jdbcServices.getJdbcMutationExecutor().execute(jdbcUpdate, updateBindings, sql -> executionContext.getSession().getJdbcCoordinator().getStatementPreparer().prepareStatement(sql), (integer, preparedStatement) -> {
                    }, executionContext);
                }
                insertStatement.addTargetColumnReferences(new ColumnReference((String) null, keyColumns[0], false, null, null, identifierMapping.getJdbcMapping(), sessionFactory));
                querySpec.getSelectClause().addSqlSelection(new SqlSelectionImpl(1, 0, new ColumnReference(updatingTableReference.getIdentificationVariable(), idColumnReference.getColumnExpression(), false, null, null, idColumnReference.getJdbcMapping(), sessionFactory)));
            }
        }
    }
    final JdbcInsert jdbcInsert = jdbcServices.getJdbcEnvironment().getSqlAstTranslatorFactory().buildInsertTranslator(sessionFactory, insertStatement).translate(null, executionContext.getQueryOptions());
    if (identifierGenerator instanceof PostInsertIdentifierGenerator) {
        final PostInsertIdentifierGenerator generator = (PostInsertIdentifierGenerator) identifierGenerator;
        final boolean generatedKeysEnabled = sessionFactory.getSessionFactoryOptions().isGetGeneratedKeysEnabled();
        final InsertGeneratedIdentifierDelegate identifierDelegate = generator.getInsertGeneratedIdentifierDelegate((PostInsertIdentityPersister) entityDescriptor.getEntityPersister(), jdbcServices.getDialect(), generatedKeysEnabled);
        final String finalSql = identifierDelegate.prepareIdentifierGeneratingInsert(jdbcInsert.getSql());
        final BasicEntityIdentifierMapping identifierMapping = (BasicEntityIdentifierMapping) entityDescriptor.getIdentifierMapping();
        final ValueBinder jdbcValueBinder = identifierMapping.getJdbcMapping().getJdbcValueBinder();
        for (Map.Entry<Object, Object> entry : entityTableToRootIdentity.entrySet()) {
            final Object rootIdentity = identifierDelegate.performInsert(finalSql, executionContext.getSession(), new Binder() {

                @Override
                public void bindValues(PreparedStatement ps) throws SQLException {
                    jdbcValueBinder.bind(ps, entry.getKey(), 1, executionContext.getSession());
                }

                @Override
                public Object getEntity() {
                    return null;
                }
            });
            entry.setValue(rootIdentity);
        }
        final JdbcParameter entityIdentity = new JdbcParameterImpl(identifierMapping.getJdbcMapping());
        final JdbcParameter rootIdentity = new JdbcParameterImpl(identifierMapping.getJdbcMapping());
        final List<Assignment> temporaryTableAssignments = new ArrayList<>(1);
        temporaryTableAssignments.add(new Assignment(new ColumnReference((String) null, identifierMapping, sessionFactory), rootIdentity));
        final UpdateStatement updateStatement = new UpdateStatement(temporaryTableReference, temporaryTableAssignments, new ComparisonPredicate(new ColumnReference((String) null, TemporaryTable.ENTITY_TABLE_IDENTITY_COLUMN, false, null, null, identifierMapping.getJdbcMapping(), sessionFactory), ComparisonOperator.EQUAL, entityIdentity));
        final JdbcUpdate jdbcUpdate = jdbcServices.getJdbcEnvironment().getSqlAstTranslatorFactory().buildUpdateTranslator(sessionFactory, updateStatement).translate(null, executionContext.getQueryOptions());
        final JdbcParameterBindings updateBindings = new JdbcParameterBindingsImpl(2);
        for (Map.Entry<Object, Object> entry : entityTableToRootIdentity.entrySet()) {
            updateBindings.addBinding(entityIdentity, new JdbcParameterBindingImpl(identifierMapping.getJdbcMapping(), entry.getKey()));
            updateBindings.addBinding(rootIdentity, new JdbcParameterBindingImpl(identifierMapping.getJdbcMapping(), entry.getValue()));
            jdbcServices.getJdbcMutationExecutor().execute(jdbcUpdate, updateBindings, sql -> executionContext.getSession().getJdbcCoordinator().getStatementPreparer().prepareStatement(sql), (integer, preparedStatement) -> {
            }, executionContext);
        }
    } else {
        jdbcServices.getJdbcMutationExecutor().execute(jdbcInsert, JdbcParameterBindings.NO_BINDINGS, sql -> executionContext.getSession().getJdbcCoordinator().getStatementPreparer().prepareStatement(sql), (integer, preparedStatement) -> {
        }, executionContext);
    }
}